HJC CS-R2 Sawtooth Full-Face Motorcycle Helmet (MC-5, Medium) Advanced Aerodynamic Polycarbonate Composite Sculptured Shell - Lightweight superior fit and comfort using advanced CAD technology ACS Advanced Channeling ventilation system - Full front to back airflow flushes heat and humidity up and out Optically Superior Anti - Scratch Face Shield - Hard coated 3D shield design provides 95 percent U.V. protection and Anti-Scratch coating RapidFire HJ-09 shield replacement system - Quick, secure, tool-less removal and installation - Proven reliability and easy to use system - 2-Stage shield closure mechanism - Compresses shield into eye port gasket providing an extremely secure seal Multiple optional shields available; RST mirrored, high definition (amber ), smoke, gradient and race shields with tear-off posts